chore: update msrv to 1.62.1

.github/workflows/ci.yml

@@ -40,6 +40,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.51.0
+          toolchain: 1.62.1
           override: true
       - run: cargo check

Cargo.toml

@@ -9,7 +9,8 @@ repository = "https://github.com/bmwill/diffy"
 readme = "README.md"
 keywords = ["diff", "patch", "merge"]
 categories = ["text-processing"]
-edition = "2018"
+rust-version = "1.62.1"
+edition = "2021"
 
 [dependencies]
 nu-ansi-term = "0.46.0"

src/utils.rs

@@ -76,6 +76,7 @@ pub trait Text: Eq + Hash {
     fn is_empty(&self) -> bool;
     fn len(&self) -> usize;
     fn starts_with(&self, prefix: &str) -> bool;
+    #[allow(unused)]
     fn ends_with(&self, suffix: &str) -> bool;
     fn strip_prefix(&self, prefix: &str) -> Option<&Self>;
     fn strip_suffix(&self, suffix: &str) -> Option<&Self>;
@@ -84,6 +85,7 @@ pub trait Text: Eq + Hash {
     fn split_at(&self, mid: usize) -> (&Self, &Self);
     fn as_str(&self) -> Option<&str>;
     fn as_bytes(&self) -> &[u8];
+    #[allow(unused)]
     fn lines(&self) -> LineIter<Self>;
 
     fn parse<T: std::str::FromStr>(&self) -> Option<T> {